One of the strangest parts of #FFXIV #Heavensward is that the MSQ "The Beast That Mourned at the Heart of the Mountain" (Patch 3.4) requires that you re-do the trial "The Navel (Hard)", which you were already required to do in order to unlock the MSQ "Good Intentions" in #ARealmReborn (Patch 2.5).
I can't remember any other MSQ that requires you re-do a duty or trial you've already completed. Normally, it's a higher level difficulty that you have to clear.

















